/*
* ring_buffer_iterator.c
*
- * (C) Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* Ring buffer and channel iterators. Get each event of a channel in order. Uses
* a prio heap for per-cpu buffers, giving a O(log(NR_CPUS)) algorithmic
* complexity for the "get next event" operation.
*
+ * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
* Author:
* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Dual LGPL v2.1/GPL v2 license.
*/
#include "../../wrapper/ringbuffer/iterator.h"
+#include "../../wrapper/file.h"
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/module.h>
ssize_t lib_ring_buffer_get_next_record(struct channel *chan,
struct lib_ring_buffer *buf)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer_iter *iter = &buf->iter;
int ret;
void lib_ring_buffer_get_empty_buf_records(const struct lib_ring_buffer_config *config,
struct channel *chan)
{
- struct ptr_heap *heap = &chan->iter.heap;
+ struct lttng_ptr_heap *heap = &chan->iter.heap;
struct lib_ring_buffer *buf, *tmp;
ssize_t len;
default:
/*
* Insert buffer into the heap, remove from empty buffer
- * list. The heap should never overflow.
+ * list.
*/
CHAN_WARN_ON(chan, len < 0);
list_del(&buf->iter.empty_node);
- CHAN_WARN_ON(chan, heap_insert(heap, buf) != NULL);
+ CHAN_WARN_ON(chan, lttng_heap_insert(heap, buf));
}
}
}
ssize_t channel_get_next_record(struct channel *chan,
struct lib_ring_buffer **ret_buf)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer *buf;
- struct ptr_heap *heap;
+ struct lttng_ptr_heap *heap;
ssize_t len;
if (config->alloc == RING_BUFFER_ALLOC_GLOBAL) {
/*
* get next record for topmost buffer.
*/
- buf = heap_maximum(heap);
+ buf = lttng_heap_maximum(heap);
if (buf) {
len = lib_ring_buffer_get_next_record(chan, buf);
/*
buf->iter.timestamp = 0;
list_add(&buf->iter.empty_node, &chan->iter.empty_head);
/* Remove topmost buffer from the heap */
- CHAN_WARN_ON(chan, heap_remove(heap) != buf);
+ CHAN_WARN_ON(chan, lttng_heap_remove(heap) != buf);
break;
case -ENODATA:
/*
* don't add to list of empty buffer, because it has no
* more data to provide, ever.
*/
- CHAN_WARN_ON(chan, heap_remove(heap) != buf);
+ CHAN_WARN_ON(chan, lttng_heap_remove(heap) != buf);
break;
case -EBUSY:
CHAN_WARN_ON(chan, 1);
/*
* Reinsert buffer into the heap. Note that heap can be
* partially empty, so we need to use
- * heap_replace_max().
+ * lttng_heap_replace_max().
*/
CHAN_WARN_ON(chan, len < 0);
- CHAN_WARN_ON(chan, heap_replace_max(heap, buf) != buf);
+ CHAN_WARN_ON(chan, lttng_heap_replace_max(heap, buf) != buf);
break;
}
}
- buf = heap_maximum(heap);
+ buf = lttng_heap_maximum(heap);
if (!buf || buf->iter.timestamp > chan->iter.last_qs) {
/*
* Deal with buffers previously showing no data.
lib_ring_buffer_wait_for_qs(config, chan);
}
- *ret_buf = buf = heap_maximum(heap);
+ *ret_buf = buf = lttng_heap_maximum(heap);
if (buf) {
/*
* If this warning triggers, you probably need to check your
}
/* Add to list of buffers without any current record */
- if (chan->backend.config->alloc == RING_BUFFER_ALLOC_PER_CPU)
+ if (chan->backend.config.alloc == RING_BUFFER_ALLOC_PER_CPU)
list_add(&buf->iter.empty_node, &chan->iter.empty_head);
}
#ifdef CONFIG_HOTPLUG_CPU
static
-int __cpuinit channel_iterator_cpu_hotplug(struct notifier_block *nb,
+int channel_iterator_cpu_hotplug(struct notifier_block *nb,
unsigned long action,
void *hcpu)
{
struct channel *chan = container_of(nb, struct channel,
hp_iter_notifier);
struct lib_ring_buffer *buf = per_cpu_ptr(chan->backend.buf, cpu);
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
if (!chan->hp_iter_enable)
return NOTIFY_DONE;
int channel_iterator_init(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer *buf;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU) {
int cpu, ret;
INIT_LIST_HEAD(&chan->iter.empty_head);
- ret = heap_init(&chan->iter.heap,
- num_possible_cpus()
- * sizeof(struct lib_ring_buffer *),
+ ret = lttng_heap_init(&chan->iter.heap,
+ num_possible_cpus(),
GFP_KERNEL, buf_is_higher);
if (ret)
return ret;
void channel_iterator_unregister_notifiers(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU) {
chan->hp_iter_enable = 0;
void channel_iterator_free(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU)
- heap_free(&chan->iter.heap);
+ lttng_heap_free(&chan->iter.heap);
}
int lib_ring_buffer_iterator_open(struct lib_ring_buffer *buf)
{
struct channel *chan = buf->backend.chan;
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
CHAN_WARN_ON(chan, config->output != RING_BUFFER_ITERATOR);
return lib_ring_buffer_open_read(buf);
}
int channel_iterator_open(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer *buf;
int ret = 0, cpu;
void channel_iterator_release(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer *buf;
int cpu;
lib_ring_buffer_put_next_subbuf(buf);
buf->iter.state = ITER_GET_SUBBUF;
/* Remove from heap (if present). */
- if (heap_cherrypick(&chan->iter.heap, buf))
+ if (lttng_heap_cherrypick(&chan->iter.heap, buf))
list_add(&buf->iter.empty_node, &chan->iter.empty_head);
buf->iter.timestamp = 0;
buf->iter.header_len = 0;
void channel_iterator_reset(struct channel *chan)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
struct lib_ring_buffer *buf;
int cpu;
/* Empty heap, put into empty_head */
- while ((buf = heap_remove(&chan->iter.heap)) != NULL)
+ while ((buf = lttng_heap_remove(&chan->iter.heap)) != NULL)
list_add(&buf->iter.empty_node, &chan->iter.empty_head);
for_each_channel_cpu(cpu, chan) {
struct lib_ring_buffer *buf,
int fusionmerge)
{
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
size_t read_count = 0, read_offset;
ssize_t len;
read_offset = *ppos;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU
&& fusionmerge)
- buf = heap_maximum(&chan->iter.heap);
+ buf = lttng_heap_maximum(&chan->iter.heap);
CHAN_WARN_ON(chan, !buf);
goto skip_get_next;
}
size_t count,
loff_t *ppos)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->lttng_f_dentry->d_inode;
struct lib_ring_buffer *buf = inode->i_private;
struct channel *chan = buf->backend.chan;
size_t count,
loff_t *ppos)
{
- struct inode *inode = filp->f_dentry->d_inode;
+ struct inode *inode = filp->lttng_f_dentry->d_inode;
struct channel *chan = inode->i_private;
- const struct lib_ring_buffer_config *config = chan->backend.config;
+ const struct lib_ring_buffer_config *config = &chan->backend.config;
if (config->alloc == RING_BUFFER_ALLOC_PER_CPU)
return channel_ring_buffer_file_read(filp, user_buf, count,
}
const struct file_operations channel_payload_file_operations = {
+ .owner = THIS_MODULE,
.open = channel_file_open,
.release = channel_file_release,
.read = channel_file_read,
- .llseek = lib_ring_buffer_no_llseek,
+ .llseek = vfs_lib_ring_buffer_no_llseek,
};
EXPORT_SYMBOL_GPL(channel_payload_file_operations);
const struct file_operations lib_ring_buffer_payload_file_operations = {
+ .owner = THIS_MODULE,
.open = lib_ring_buffer_file_open,
.release = lib_ring_buffer_file_release,
.read = lib_ring_buffer_file_read,
- .llseek = lib_ring_buffer_no_llseek,
+ .llseek = vfs_lib_ring_buffer_no_llseek,
};
EXPORT_SYMBOL_GPL(lib_ring_buffer_payload_file_operations);
projects / lttng-modules.git / blobdiff